Addison UHD150, Installation, Operation & Service Manual

Page: 55 / 68

SECTION 15: R
EPLACEMENT
P
ARTS
47 of 55
15.4 Heat Exchanger
The heat exchanger consists of a four-pass design with 1.75" outer diameter [409 stainless steel] tube. The
tube plates are made of [aluminized steel] [409 stainless steel]. The tube supports are made of [aluminized
steel] [409 stainless steel].
15.5 Flue Blower for Models UHD[T][M][X][S][R] 150-300
IT IS IMPORTANT THAT ONLY THE CORRECT FLUE BLOWER SPECIFIED FOR EACH MODEL TYPE
IS USED WHEN REPLACING THESE ITEMS.
Carry out a start-up after working on or changing a flue blower. See Page 28, Section 11 .
MODEL
UHD[T][M][X][S][R]
150 - 300
Flue Blower P/N 90710403
Remove screws securing
outlet flange to the flue
adapter.
Refit in reverse order.
Disconnect electrical
connections at plug in tabs.
Remove screws securing flue
fan mounting plate to vent
box.
Remove screws securing
mounting plate to fan. (Not
shown)
Refit in reverse.
Use new gaskets.
Ensure sealed joints.
Ensure mounting plate orifice
is clear and not obstructed.